re: Do more people go to church on Christmas Eve or Easter?

Christmas has a lot more activities going on than Easter. Church's competition during Easter are candy and egg-hunts. The Easter Bunny gets old before adolescence (unless you're a fatty) so the only meaning remaining is the religious aspect. Christmas, on the other hand scales with age and way of life.

You'll know Easter has become a top tier holiday when you start seeing luxury SUV commercials with Easter music; and when Easter specific music comes into existence.

In my experience, last time I went to church, for anything besides a wedding or funeral, was Easter.